package com.msunsoft.support.dozer;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.dozer.DozerBeanMapper;

/**
 * 简单封装Dozer, 实现深度转换Bean<->Bean的Mapper.实现: 
 * 1. 持有Mapper的单例. 
 * 2. 返回值类型转换. 
 * 3. 批量转换Collection中的所有对象. 
 * 4. 区分创建新的B对象与将对象A值复制到已存在的B对象两种函数.
 * 
 * @author calvin
 */
public class DozerMapperHelper {

    /**
     * 持有Dozer单例, 避免重复创建DozerMapper消耗资源.
     */
    private static DozerBeanMapper dozer = new DozerBeanMapper ();

    /**
     * 基于Dozer转换对象的类型.
     */
    @SuppressWarnings("static-access")
    public static <T> T map(Object source,Class<T> destinationClass){
        return dozer.map (source, destinationClass);
    }

    /**
     * 基于Dozer转换Collection中对象的类型.
     */
    @SuppressWarnings("static-access")
    public static <T> List<T> mapList(@SuppressWarnings("rawtypes") Collection sourceList,Class<T> destinationClass){
        List<T> destinationList = new ArrayList<T> ();
        for ( Object sourceObject : sourceList ) {
            T destinationObject = dozer.map (sourceObject, destinationClass);
            destinationList.add (destinationObject);
        }
        return destinationList;
    }

    /**
     * 基于Dozer将对象A的值拷贝到对象B中.
     */
    @SuppressWarnings("static-access")
    public static void map(Object source,Object destinationObject){
        dozer.map (source, destinationObject);
    }
}